Find the communication port of crash 3

Time:2021-10-15
  1. Install crash 3 in the simulator
  2. Find the process ID of the simulator in the task manager. The Mumu simulator I use has multiple processes, of which only one process is related to network communication.
    Find the communication port of crash 3
  3. Open CMD console
  4. netstat -aon|findstr “7408”
    Find the communication port of crash 3
  5. There are many communication ports related to “7408”. Only ports with status established are required. Then filter out port 80 (HTTP protocol). The remaining 443, 7002 and 16100.
  6. After capturing packets through Wireshark, it is further screened.
  7. Wireshark, use tcp.port EQ port number to filter packets.
    Find the communication port of crash 3
  8. When we click to close the game, we will generate a TCP closed handshake, and then click to enter the game, which will generate a handshake to establish a connection.
    When closing the application: the client sends [fin ack] “[fin ack] corresponding to the server and [ack] corresponding to the client to the server
    When establishing a connection: the client sends [syn] to the server [syn ack] corresponding to the server and [ack] corresponding to the client
    Find the communication port of crash 3
    Find the communication port of crash 3
  9. Finally, it is found that 16100 is the most likely port

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